WO2012027419A4 - Elongated led lamp for replacing a fluorescent lamp - Google Patents

Elongated led lamp for replacing a fluorescent lamp Download PDF

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Publication number
WO2012027419A4
WO2012027419A4 PCT/US2011/048877 US2011048877W WO2012027419A4 WO 2012027419 A4 WO2012027419 A4 WO 2012027419A4 US 2011048877 W US2011048877 W US 2011048877W WO 2012027419 A4 WO2012027419 A4 WO 2012027419A4
Authority
WO
WIPO (PCT)
Prior art keywords
light
lamp
chassis
light source
distribution arrangement
Prior art date
Application number
PCT/US2011/048877
Other languages
French (fr)
Other versions
WO2012027419A1 (en
Inventor
Keith Kazenski
Roger F. Buelow
Laszlo A. Takacs
Chris H. Jenson
Original Assignee
Energy Focus, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Energy Focus, Inc. filed Critical Energy Focus, Inc.
Priority to EP11820560.8A priority Critical patent/EP2609364A4/en
Priority to JP2013526110A priority patent/JP2013536563A/en
Publication of WO2012027419A1 publication Critical patent/WO2012027419A1/en
Publication of WO2012027419A4 publication Critical patent/WO2012027419A4/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/68—Details of reflectors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • F21V23/023—Power supplies in a casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/357—Driver circuits specially adapted for retrofit LED light sources
    • H05B45/3578—Emulating the electrical or functional characteristics of discharge lamps

Abstract

An elongated LED lamp suitable for replacing a fluorescent lamp in a lamp fixture comprises a chassis having a first chassis end with two electrodes adapted to be respectively coupled for two electrodes in the lamp fixture supplying AC power, and a second chassis end, A light source depends from the chassis. A power regulating circuit is mounted to the chassis and is coupled to the two electrodes for providing DC power to the first light source. A first light collector conditions the light it collects light from the first light source for TIR propagation within a sidelight distribution arrangement. An elongated side-light distribution portion depends from the chassis and receives light exiting the first light collector. Light-extraction structure extract light from the side of the first portion, along a Length of the first portion, in a different direction from the direction of light received from the first light collector.

Claims

AMENDED CLAIMS received by the International Bureau on 8 March 2012 (08.03.2012)What is claimed is:
1. An elongated LED lamp suitable for replacing a fluorescent lamp in a lamp fixture, comprising:
a) an elongated chassis having a first chassis end with two electrodes that are adapted to be respectively coupled to two electrodes in the lamp fixture supplying AC power, and a second chassis end;
b) a first light source depending from the chassis, comprising at least one LED, and being located more proximate said first chassis end than said second chassis end;
c) a power regulating circuit mounted to the chassis and coupled to said two electrodes for providing DC power to the first light source;
d) a first light-collection means having an input that collects at least 25 percent of the light emitted by the first light source, and having an output that directs over half of the light collected at the input with an angular distribution different from that of the light when received at the input and appropriate for total internal reflection within an elongated side-light distribution arrangement; and e) the elongated side-light distribution arrangement having a first portion depending from the chassis and being arranged to receive at least a majority of the light exiting the first light-collection means; the first portion comprising:
i) a rod with an elongated shape having a minimum dimension of a cross- section taken along a length of a first portion that exceeds 50 percent of the maximum dimension of said cross-section; and
ii) light-extraction means of the scattering type for extracting light from the side of the first portion, along a length of the first portion, in a different direction from the direction of light received from the first light-collection means.
2. The lamp of claim 1, wherein the light-extraction means extends along a length of the first portion of the side-iight distribution arrangement for a distance greater than 50 percent of the distance between the first and second ends of the electric lamp.
3. The lamp of claim 1, wherein the first light source comprises one or more LED light sources, all of which are provided with a single pair of power leads and a single lens for conditioning the light output.
4. The lamp of claim 1 , wherein the chassis contains an elongated cavity extending along a length of the chassis for containing electronic elements.
5. The lamp of claim 4, wherein said cavity includes said power regulating circuit.
6. The lamp of claim 1 , wherein:
a) the chassis supports an elongated reflector facing the side-light distribution arrangement and shaped to partially surround said side-light distribution arrangement about a longitudinal axis of the side-light distribution arrangement; and
b) the reflector presenting to the side-light distribution arrangement a non-specular, diffuse reflecting surface that is configured to reflect light, extracted from the sidelight distribution arrangement by the light-extraction means, to a desired target area to be illuminated.
7. The lamp of claim 6, wherein the dimension of said reflecting surface presented to the first side-light distribution portion, taken crosswise to said longitudinal axis of said first side-light distribution portion, being at least about 1.3 times the maximum dimension of the light-extraction portion taken in the same plane.
8. The lamp of claim 1, wherein the distance between the first and second chassis ends is at least about 30.5 centimeters.
9. The lamp of claim 1, wherein the first light-collection means has an input that collects at least 75 percent of the light emitted by the first light source.
10. The lamp of claim 1 , wherein the second chassis end has two electrodes that are adapted to be respectively coupled to electrodes in the lamp fixture supplying AC power; and further comprising:
a) a second light source comprising at least one LED light source located more proximate said second chassis end than first second chassis end; and b) a power regulating circuit mounted to the chassis for providing DC power to the second light source;
c) a second light-collection means and an associated second portion of the sidelight distribution arrangement conforming to the above-mentioned features of first light-collection means and the first portion of the side-light distribution arrangement, respectiveiy.
11. The lamp of claim 10, wherein said power regulating circuit for providing power to the second light source is the same as said power regulating circuit for providing power to the second light source.
12. The lamp of claim 10, wherein the first and second light sources are located within about five centimeters of the first and second chassis ends, respectively.
13. The lamp of claim 12, wherein the lamp is free of further light sources located between the first and second light sources.
14. The lamp of claim 10, wherein:
a) light from the first light source passes through a distal end of the first side-light distribution portion and passes into the second side-light distribution portion, and b) light from the second light source passes through a distal end of the second sidelight distribution portion and passes into the first side-light distribution portion.
15. The lamp of claim 10, wherein the first and second portions of the side-light distribution arrangement are optically isolated from each other.
16. The lamp of claim 10, wherein the first and second portions of the side-light distribution arrangement are optically coupled to each other.
17. The lamp of claim 1, wherein the first light-collection means conforms at least approximately to the rules of non-imaging optics.
18. The lamp of claim 1, wherein a majority of the length of the side-light distribution arrangement is spaced from the chassis.
PCT/US2011/048877 2010-08-23 2011-08-23 Elongated led lamp for replacing a fluorescent lamp WO2012027419A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11820560.8A EP2609364A4 (en) 2010-08-23 2011-08-23 Elongated led lamp for replacing a fluorescent lamp
JP2013526110A JP2013536563A (en) 2010-08-23 2011-08-23 An elongated LED lamp that can be used in place of a fluorescent lamp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37592710P 2010-08-23 2010-08-23
US61/375,927 2010-08-23

Publications (2)

Publication Number Publication Date
WO2012027419A1 WO2012027419A1 (en) 2012-03-01
WO2012027419A4 true WO2012027419A4 (en) 2012-04-26

Family

ID=45593942

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2011/048877 WO2012027419A1 (en) 2010-08-23 2011-08-23 Elongated led lamp for replacing a fluorescent lamp

Country Status (4)

Country Link
US (1) US8956006B2 (en)
EP (1) EP2609364A4 (en)
JP (1) JP2013536563A (en)
WO (1) WO2012027419A1 (en)

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Also Published As

Publication number Publication date
EP2609364A1 (en) 2013-07-03
US8956006B2 (en) 2015-02-17
WO2012027419A1 (en) 2012-03-01
JP2013536563A (en) 2013-09-19
EP2609364A4 (en) 2014-12-10
US20120044666A1 (en) 2012-02-23

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